Roll-holder for rivet spinning machines



July 2a, 1931. G. A. LINLEY LSIYSAW ROLL HOLDER FOR RIVET SPINNING MACHINES Filed June 26. 1929 VINVENTOR.

EEDR'EE f1 LINLEY.

ATTORNEX Patented July 28, 1931.

UNITED STATES GEORGE A. LINLEY, OF TRI B LL, ooitnnc'rrcur ROLL-HOLDER FOR RIVET' srinnmel MACHINES Application filed June 26,

The present invention relates to roll-holders for rivet spinning machines, and has for an object to provide a roll-holder which will effectually support the rolls in such manner that they will not separate through strain or wear, and which may be adjusted as desired to insure a proper relation of the rolls. The roll-holder is of a type in which a pair of rolls are rotatably held in a holder at a slight angle, with their concave peripheral surfaces meeting at the bottom, where they engage and form the rivet head, and separated at the top. With roll-holders heretofore in use the rolls would become separated after very little use, either due to wear or strain, with the result that a small bur would be formed at the center of the rivet head.

It is proposed in the present invention to provide a roll-holder in which the roll supporting axle may be tightened with respect to the side arms of the holder to any desired extent drawing the arms into close relation with the rolls, and in which means are provided to eflectually retain the axle or pin against loosening under the severe strain to which the device is put in use.

With the above and other objects in view "embodiments of the invention are shown in the accompanying drawings, and these embodiments will be hereinafter more fully described with reference thereto, and the invention will be finally pointed out in the claim.

In the drawings Fig. 1 is a front elevation of a roll-holder, according to one embodiment of the invention. 7

Fig. 2 is a side elevation thereof.

Fig. 3 is a vertical sectional view taken along the line 83 of Fig. 1. r

Fig. 4 is a vertical sectional view of a modified form of the invention.

' Similar reference characters indicate corresponding parts throughout the several figures of the drawings.

Referring to the drawings, the roll-holder is of substantially cylindrical shape, and is provided at its upper end with the usual hexagonal flange 10, for securing the same 1929. Serial No. 373,822.

to the threaded shank of ethe spinning ma:-

chine, an interiorly threaded socket llbeing provided in the upper endof the holder for this purposep A pair of downwardly extending spaced arms or jawsl2 and l3..are

provided between which the rolls rotate, the inner walls of these arms being fiatand slightly inclined toward each other downwardly, so that the opening between. the arms is slightly wider at: the top. than vat the bottom. This opening is dividedatthe top by a. downwardly proj ecting. finlh; the

sides of which are. tapered in parallel relation to. the inner tapered sides. of thearms, and is adapted to separate the, rolls at the top, as will presently more fully appear.

The arm 13' is provided with a shouldered passage'li') while thearm 12 is provided. in opposed" relation with ,a threaded passage 16, the arm being split below this passage-as at 17 and beingtempered, 'so that a slight spring. action is permitted. r

The passage. 1.6;is-counter, sunkfat its in ner end; as at 16 ,,so th atcthe plane portionofthe pin will provide a full. bearing surface; for the rolls,.as. will presently morefully' appeaiz:

Therolls'18, .19 which are of the usual form, are rotatably mounted on a pin or axle 20rhaving ,a head 21 atone end and threadedfat the other end, as at 22' .The pin 20 is engaged, through the passageyl5 and screwedinto the threaded passage .16, the lattenpassage tightly binding upon: it with springpressure so. thatany tendency .to loosenis prevented. The pinwis thus securely held, in any position of adjustment and may be tightened'zto any desired extent ,to draw; the arm 12 toward the arm 13,

and therebymaintain' a tight relationof the I 7 rolls at their point of contact. ,In theusual typeof roll-holder'the pin is jshoul'dered adjacent the screw threads, this shoulder abutting theinner wall of the arm into which-the pin is screwed, so that when. it

is tightly screwed into place thelrelation of the arms isfixed'and no adjustment for wear is possible. According to my invention the screw may be tightened to any desired extent, so'that regardless of wear "I tion, but it will be obvious that changes may the rolls may be maintained in their proper tight relation. The period of use of the rolls is thus greatly extended and the formation of burs on the rivet heads and other objectionable features is obviated. The pin is furthermore stronger so that the possibility of shirring-ofl' the threaded end is prevented. v s

In Fig. 4 I have illustrated a modification in which the arm 13 is provided with a split 23 below the passage 16 and is also tempered, so that it supplements the bind V 7 ing action of the arm '12 upon the pin.

I have illustrated and described preferred and satisfactory embodiments of my invenbemade therein within the spirit and scope thereof, as defined in the appended claim.

Having thus described my invention, what I claim and desire to secureby Letters Patent is t In a roll holder for rivet spinning machines, a holder body having a pair of spaced :arms having upwardly diverging opposed walls and capable of being drawn one toward the other, said arms having aligned pin receiving passages, one of which is threaded,

I v the arm having said threaded passage being tempered and having a split extending outwardly from said threaded passage and rendering said passage a compressible and expansible binding surface, a pair of apertured rolls disposed between said ,Walls and having bearing contact therewith, and haVingbearing-contact with each other at the rivet spinning point outwardly of said arms, separating means disposed between said rolls adapted to maintain them in di vergingrelation parallel to said diverging walls, a pin having a head at one end and a threaded portion at the other end, said pin being engaged in said passages of the arms and the apertures of said rolls with the headed end abutting said arm having the unthreaded passage and the threaded end engaging said threaded. passage of the other arm, the threads of said threaded end extending inwardly from said threaded passage in the normal engaged relation and adapted to be further screwed into said threaded passage to draw said arms one to- Ward the other to maintain the bearing con tact of said rolls with each other as they become worn, and said binding surfaceof the threaded passage adapted to frictionally retain said pin against turning to main- 132111111 the adjusted relation of said arms and r0 s.

Signed at Bridgeport, in the county of Fairfield, and State of Connecticut, this 21st day of June, 1929.

V GEORGEQA. LINLEY. 

